Arc-lamp.



T. L. OARBONB.

ARC LAMP. APPLICATION FILED FEB. 21, 1910.

1,017,641. Patented Feb. 13,1912.

WITNE SES TITO LIVIQ CARBON E, OF CHAIRLOTTENBURG, GERMANY.

ARC-LAMP.

oiacar Specification of Letters Patent.

Patented Feb. 13, 1912.

Application filed February 21, 1910. Seria1'No. 545,090.

To all whom it may concern Be it known that I, TITO LIvIo CARBONE acitizen of the Swiss Republic, residing in Charlottenburg, near Berlin,Germany, have invented certain new and usefultImprovements in Arc-Lamps,of which the following is a specification. I

My present invention refers to electric arc-lamps of the kind usuallyemployed where economy in the consumption of electrodes is looked for.To attain this object it is necessary to prevent access of -freslrair tothe are by closing the globe, so that the oxygen contained thereinwhenthe lamp is started is quickly consumed and the com-' bustion of theelectrodes thereby very much retarded. As is well known in the art,great difiiculty with lamps of this kind is experienced when electrodesare employed that'are impregnated with salts or similar substances whichgenerate smoke when the electrodes are burned in the arc. I havediscovered that this difliculty can be overcome byusing an inclosurecomprising several chambers and by placing the arc in one of said chambers. W'hen this arrangement is used the products of combustion settleasaprecipitate or deposit remotely from the arc and the chambersurrounding the are remains clear. This arrangement I have described 1nPatent No. 975,935, granted to me November The present invention is animprovement over my previous invention. I find that I can obtain thedesired result by surrounding the arc with a substantially hemisphericalor egg-shaped globe and arranging above it a chamber preferably of afiat parasol-like shape so that its walls are shaded from the directradiation of the arc.

The drawing represents a sectional elevation of a lamp constructedaccording to my invention and showing one embodiment thereof.

In the drawing, the usual casing 1 contains the mechanism for feedingthe electrodes into the arc.

- The top part of the casing is broken away as forming no part of myinvention. The electrodes 0 0 protrude'downward through the bottom ofthe casing Z and converge'toward the are in this embodiment, whichisadapted to arc-lamps in which the electrodes are both introducedfrom-above and converge toward the arc in the shape ofa V. i Theinclosure 9 is shaped so as to formtwo Qhamw that the smoke particlesare effectually prevented from settling in the, part where the walls arein proximity tothe arc and are SHbJGCtGd to moreor less normallyimplnging rays and-are therefore precipitated in the part which byvirtue of its shape is protected against any direct impact of the raysof light. By giving this latter part a shape as shown in the drawing, Iobtain the further advantage that it is adapted to act as a lam shade,and also as a reflector. When it is desired to obtain a more perfect andcon stant reflection of the light from its walls, I make the latter'ofmilky-glass or of any other suitable substance, such as, for instance,of enameled or polished metal.

Having thus described my invent-ion, I claim as new and'desire to secureby Letters Patent:

1. An arc-lamp burning smoke-producing carbons, comprising a closedglobe having in combination. a. substantially hemispherical .chambersubstantially concentric with the arc and having all its parts in close.proximity'thereto, and a chamber'having its outer part remote from thearc.

2. An arc lamp burningsmoke producing carbons, comprising a chamberentirely closed surrounding the smoke producing arc, having incombination, a substantially hemispherical globe substantiallyconcentric to the position of the arc, and having all its parts incloseproximity thereto, whereby it is heated substantially equallythroughout, and a condensing chamber having its outer part remote fromthe are so asto cause a condensation therein.

3. An arc la-mp burning smoke producing carbons, comprising aninclosure, surrounding the smoke producing arc and composed of twoparts, a light. transmitting part in be substantiallyequally heated, anda condensing part remote. from the arc,'and cooler than the proximatelight transmitting part, and in free communication therewith, wherebythe coolness "causes condensation ofthe gases produced'by the arc, andthe free communication causes further gases to enter the close proximityto the arc and of a shape to condensingpart and to be condensed therein.I

4. An inclosed smoke producing carbon arc-lamp comprising an arcinclosure having an arc-heated light transmitting part in proximity tothe arc and substantially equally heated thereby, and a precipitationpart disposed above said light-tran'srnitting part and outspreadinglaterally therefrom substantially symmetrically therewith.

5. An inclosed smoke producing carbon arc-lamp comprising an arcinclosure having a light-transmitting part subjected to the direct raysof the arc and substantially equally heated thereby, and a precipitationpart disposed above said light-transmitting part and having a laterallyxtended portion forming an annular flattened chamber distant from thearc and shaded from the direct radiation of the are.

6. An inclosed smoke producing carbon- '7. In an arc-lamp, thecombination of a closed globe, and a pair of carbons protrudingdownwardly therein and adapted 'to support an arc vbetween their lowerends, said globe forming an approximately hemispherical chamberconcentric with the arc and with all parts in close proximity thereto,and also an upper substantially horizontal flattened annular chambermerging into the upper part of the hemi-spherical cham ber, the outerpart of the annular chamber being remote from the arc.

8. In an arc lamp the combination of a ing into the upper part of thehemispherical chamber, the outer part of the annular chamher beingremote from the are.

9. In an arc lamp the combination of a substantially air tight closedglobe, and a pair of converging carbons protruding downwardly throughthe upper part of the globe and adapted to support an are between theirlower ends, said globe forming about said arc an approximatelyhemi-spherical chamber concentric with said are and every portion ofwhich is in close proximity thereto, and also an upper flatteneddownwardly and outwardly inclined annular chamber merging into the upperpart of the hemi-spherical chamber, the outer part "of the annularchamber being remote from the arc, the lower part of the upper annularchamber be ing of non-transparent material.

In testimony, that I claim the foregoing as my invention, I have signedmy name in presence of two subscribing witnesses.

TITO LIVIO C'ARBONE.

\Vitnesses \VOLDEMAR HAUPT, HENRY HASPER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

. Washington, D. C.

